The Gateway was discovered by humans around 2077 or later by Sylvester Macklin by discovering and using one such ship in Venus. Without any means of escape, food or water, Macklin caused an explosion so that his location would be detectable by NASA.
The discovery of the station was a tremendous event in the history of humanity which almost caused wars. Eventually the political matter resolved with the creation of the Gateway Enterprises which would exploit the technology found there.
The station was dubbed as Gateway because it provided the Heechee ships, the only means of traveling to remote locations of the outer space. The FTL technology could not be reversed or copied by human technology, so Gateway and its ancient ships remained the only way for exploration.
Exploration relied on volunteers dubbed "Prospectors" who hoped to discover planets with Heechee remnants so that they would contribute to the exploitation of the alien technology by humanity.
Human installations transformed it into an operations center; offices, hangars and staterooms and even entertainment centers and shops ere built on Gateway.
Corridor T6 leads to the Conference Room T20 with session every day at 15:00; and to Corridor T5 to the north, which leads to the armory.
Level Babe is little exploited. The human construction gives way to the strange, almost melted look of glowing blue Heechee metal with uniform walls. The walls house some unexplored Heechee rooms.
In Frederick Pohl's novels, Gateway is a hollow asteroid. Also, there are zero-gravity conditions.